LT1585ACM-1.5#PBF

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The LT1585ACM-1.5#PBF is an ultra-low drop, low noise voltage regulator IC, which belongs to a wide range of products of PMIC (Power Management IC) and is part of the linear Voltage Regulators family. It provides a stable regulated output of 1.5V, while allowing a input voltage range of 2.375V to 11V. This regulator has an output current rating of 500mA and with a minimal drop out voltage of 0.8V the chip is highly efficient in operating conditions.

This chip is mainly employed for regulating the output of various power sources such as DC-DC converters, off-line power supplies, and dual supplies. Additionally, it finds applications in battery driven systems, servers, PCs, laptops, PDAs and appliances. The LT1585ACM-1.5#PBF is also suited for use in distributed power architectures powered by a single central core and multiple peripherals.

The LT1585ACM-1.5#PBF utilizes a proprietary fast-start, low-noise algorithm for maximum efficiency, which can reduce power dissipation and thermal noise. This chip has a high power supply rejection ratio of 65 dB, low output voltage noise of 5 μVrms, temperature stability of ±2% and a voltage accuracy of ±2%. With a low quiescent current of 1.6 mA and a low drop-out voltage of 0.8V, this IC is extremely energy efficient.

The pin-out of the LT1585ACM-1.5#PBF includes a VIN (an input voltage), an EN (for enabling and disabling the IC), a GND (for ground), an OUT (for determining the output voltage) and an ADJ (for setting the output voltage). It has an operating junction temperature range between -40°C to 125°C and a Junction-to-Case thermal resistance of 2.59°C/W.

The operating principle of the LT1585ACM-1.5#PBF is quite simple. The input voltage is compared to a voltage reference, which is internally set by the ADJ pin, and the output is regulated accordingly. The circuit utilizes a transconductance error amplifier. The voltage reference is plant inside the error amplifier and is compared with the voltage at the output. Then, a comparison circuit is used to compare the output voltage with the reference voltage. If the output voltage is lower than the reference voltage, the error amplifier gradually increases the current through the transistor, which in turn increases the output voltage.

Every change in the output voltage is measured by the voltage reference and the circuit continues to regulate the output voltage until it is equal to the reference voltage. The LT1585ACM-1.5#PBF also features an adjustable current-limit, over-temperature protection and a thermal shutdown feature. This IC also works perfectly with 3-terminal adjustable linear regulators and offers a wide range of features such as high accuracy, low-power consumption, fast-transient response and low voltage noise.

Overall, the LT1585ACM-1.5#PBF is an efficient and cost-effective solution for a wide range of power supply applications requiring regulated output voltage of 1.5V. With its low quiescent current and wide input, output and temperature range, this regulator provides great performance and can be easily integrated into a variety of systems.

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